PLATE XXIII. 



Figs, i, a-d. Hyfi?ium fiseudostramineum. 



i, a, a. Leaves ( X J 8)- 



i, b. Lower part of the costa ( X I 3°)- 



i, c. Areolation in the middle of a leaf ( X 22 5)- 



i, d. Areolation of the apex of a leaf ( X 22 5 ) • 



2, a-h. Hyfinum jflesiostramineum . 



2, a. Entire plant, natural size. 



2, b, b. Lower leaves (\i8). 



2, c. Lower part of the costa ( X J^ )- 



2, d. Upper leaf (Xi8). 



2, e. Branch leaf ( X I ^)- 



2,f. Auricle and basal areolation of a leaf ( X 22 5)- 



i,g. Cells in the middle ( X 22 5)- 



2, //. Areolation of the apex ( X 22 5)- 



3, a-e. Meesea tsckuctschica. 



3, a. Entire plant, natural size. 



3, b. Part of a stem ( X3)« 



3, c, c. Leaves (X 13)- 



3, d. Marginal areolation in the middle ( X I 35)- 



3, e. Areolation of the apex ( X I 35)- 



4, a-c. Brachythecium reflexum fiacificum. 

 4, a. Stem-leaf ( X 1 3)' 



4, b. Basal areolation ( X I 35)- 



4, c. Marginal areolation in the middle (X I 3'>)* 



(363) 



